--- a/browser/extensions/formautofill/content/manageDialog.css
+++ b/browser/extensions/formautofill/content/manageDialog.css
@@ -1,16 +1,21 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 div {
   display: flex;
 }
 
+button {
+  padding-right: 10px;
+  padding-left: 10px;
+}
+
 fieldset {
   margin: 0;
   padding: 0;
   border: none;
 }
 
 fieldset > legend {
   box-sizing: border-box;

--- a/browser/extensions/formautofill/skin/shared/editDialog.css
+++ b/browser/extensions/formautofill/skin/shared/editDialog.css
@@ -32,16 +32,21 @@ div > span {
 option {
   padding: 0.3em 0.5em;
 }
 
 textarea {
   resize: none;
 }
 
+button {
+  padding-right: 10px;
+  padding-left: 10px;
+}
+
 input,
 select {
   box-sizing: border-box;
   flex: 1 0 auto;
 }
 
 #controls-container {
   flex: 0 1 100%;

--- a/toolkit/themes/shared/in-content/common.inc.css
+++ b/toolkit/themes/shared/in-content/common.inc.css
@@ -259,17 +259,16 @@ xul|button.primary:not([disabled="true"]
   background-color: var(--in-content-primary-button-background-active);
 }
 
 xul|colorpicker[type="button"] {
   padding: 6px;
   width: 50px;
 }
 
-html|button,
 xul|button > xul|*.button-box,
 xul|menulist > xul|*.menulist-label-box {
   padding-right: 10px !important;
   padding-left: 10px !important;
 }
 
 xul|menulist > xul|*.menulist-label-box > xul|*.menulist-icon[src] {
   margin-inline-end: 5px;